Track is the sport that lends itself best to dual sporting with FB due to the individual nature of practices.
OJ Simpson and Earl McCullough members of USC world record shuttle hurdles team(low hurdles)
Willie Gault world class hurdler, Tennessee
Art Monk did Track and FB at Syacuse(NYS hs record holder HH)
The U had 4 guys at once do both when they joined the Big East, Horace Copeland, Kevin Williams, Santana Moss. Copeland won 4 events at BE
The list goes on and on, Coach Prime was fascinating, great Baseball/Football at Fla State, AND ran as part of their 4x100 relay that was national class!!
At UConn Coach Kashif Moore was part of a very accomplished group of sprinters.